mirror of https://github.com/perkeep/perkeep.git
31 lines
1.1 KiB
JavaScript
31 lines
1.1 KiB
JavaScript
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/*
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Copyright 2014 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Image utils.
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goog.provide('image_utils');
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// Returns the size of image to request for a given dimension. We round up to the nearest power of two for cache friendliness.
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image_utils.getSizeToRequest = function(sizeToDisplay, opt_existingSize) {
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if (opt_existingSize && sizeToDisplay <= opt_existingSize) {
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return opt_existingSize;
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}
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var maxImageSize = 2000; // max size server will accept
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for (var size = 64; (size <= sizeToDisplay && size < maxImageSize); size <<= 1) {
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}
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return Math.min(size, maxImageSize);
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};
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